mvhenten

type RequiredDefined<T extends Record<string, unknown>> = {
	[key in keyof T]-?:NonNullable<T[key]>
}

export function assertOptions<Options extends Record<string, unknown>, Keys extends keyof Options, Result extends Pick<Options, Keys>>(options:Options, ...keys:Keys[]):RequiredDefined<Result> {
	const result = {} as Record<string, unknown>

	for (let key of keys as string[]) {
		if (options[key] === undefined) {
			throw new TypeError(`Expected ${String(key)} to be defined`);

mvhenten

import { useState } from "react";

type ValidationValues = Record<string, unknown>;
type ValidationFunction<T> = (v: T) => string | void;

export type ValidationErrors = Record<string, string[]>;

function runValidation(
    key: string,
    validators: ValidationFunction<unknown>[],

mvhenten

ffmpeg -i $input -vf "fps=16,scale=960:-1:flags=lanczos,split[s0][s1];[s0]palettegen=max_colors=32:reserve_transparent=0[p];[s1][p]paletteuse" demo-create-row.gif

mvhenten

import { suite, test, TestContext } from "./mtap";

suite("test label", ({ test }) => {
  test("another test", (t:TestContext) => {
    t.assert("OK computer");
    t.assert(false, "intentionally failed");
  });

  test("hula hoop", (t:TestContext) => {
    t.assert(true, "juhu");

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import { set, get, createStore, UseStore, values, clear } from 'idb-keyval';


export abstract class Ministor<ItemType> {
    private db: UseStore;

    constructor() { 
        const ns = this.constructor.name;
        this.db = createStore(ns, [ns, "items"].join(":"));
    }

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/**

And the winner is:

Encoding and decoding 100000 items.
+--------------+--------+--------+--------------+
| Encoding     | encode | decode | size (bytes) |
+--------------+--------+--------+--------------+
| msgpack-lite | 504    | 206    | 1568544      |
| msgpack5     | 448    | 352    | 1568544      |

mvhenten

/**
Generate ascii table in 30 lines of readable code from a list of objects:

table([
    {
        description: "description",
        value: "value"
    },
    {
        description: "some variable desc",

mvhenten

set -e

debug() { 
    echo "$@" 1>&2
}

PREVIEW_PORT=8080

get_instance_id() {
    out=($(ec2-metadata -i))    

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#/usr/bin/env bash

# git hook to run a command after `git pull` if a specified file was changed
# Run `chmod +x post-merge` to make it executable then put it into `.git/hooks/`.

changed_files="$(git diff-tree -r --name-only --no-commit-id ORIG_HEAD HEAD)"

check_run() {
	echo "$changed_files" | grep --quiet "$1" && eval "$2"
}

mvhenten

"use strict";

/**
 * Instead of squatting https://www.npmjs.com/package/window
 * Why not make it something useful like:
 */
module.exports = typeof window == "undefined" ? null : window;